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SubjectRE: [PATCH] slub Discard slab page only when node partials > minimum setting
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On Wed, 2011-09-07 at 23:05 +0800, Christoph Lameter wrote:
> On Wed, 7 Sep 2011, Shi, Alex wrote:
>
> > Oh, seems the deactivate_slab() corrected at linus' tree already, but
> > the unfreeze_partials() just copied from the old version
> > deactivate_slab().
>
> Ok then the patch is ok.
>
> Do you also have performance measurements? I am a bit hesitant to merge
> the per cpu partials patchset if there are regressions in the low
> concurrency tests as seem to be indicated by intels latest tests.
>

My LKP testing system most focus on server platforms. I tested your per
cpu partial set on hackbench and netperf loopback benchmark. hackbench
improve much.

Maybe some IO testing is low concurrency for SLUB, maybe a few jobs
kbuild? or low swap press testing. I may try them for your patchset in
the near days.

BTW, some testing results for your PCP SLUB:

for hackbench process testing:
on WSM-EP, inc ~60%, NHM-EP inc ~25%
on NHM-EX, inc ~200%, core2-EP, inc ~250%.
on Tigerton-EX, inc 1900%, :)

for hackbench thread testing:
on WSM-EP, no clear inc, NHM-EP no clear inc
on NHM-EX, inc 10%, core2-EP, inc ~20%.
on Tigertion-EX, inc 100%,

for netperf loopback testing, no clear performance change.





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